1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 481 · 40 questions

The trick (Reverse and subtract): Reverse the number and take the smaller number away from the bigger one. The answer is always one of 198, 297, 396, 495, 594, 693, 792, 891: middle digit 9, first and last digits adding to 9. Reverse that answer and add: you always get 1089.

1. 1.Do the 1089 trick with 431: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 612. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.Take 785. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
6. 6.Do the 1089 trick with 519: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.693 + 396 =
10. 10.Do the 1089 trick with 733: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 795: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 166: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 348. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.396 + 693 =
15. 15.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.198 + 891 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
19. 19.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.297 + 792 =
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
22. 22.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 943: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 861: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 562: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 431. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
28. 28.891 + 198 =
29. 29.792 + 297 =
30. 30.Take 812. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 496. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 975: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 509. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
37. 37.Take 561. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 186: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 173. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 714: reverse and subtract, then reverse that answer and add. What do you get?

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